package day2;

/**
 * @author oldliu
 * @since 1.0
 */
public class Shuxue2 {
    public static void main(String[] args) {
        int a=10;
        a++;
        System.out.println(a);
        a-=3;//a=a-3
        System.out.println(a);
        double d=4.5;

    }
}
